using System;
using System.Collections;
using System.Collections.Generic;

namespace ColladaDotNet.OpenTKMapping
{
	public abstract class CollectionWithIds<T>:IEnumerable<T>,IList<T>
	{
		Dictionary<string,T> itemById = new Dictionary<string, T>();
		protected List<T> itemList = new List<T>();

	

		/// <summary>
		/// Determines the index of a specific item in the <see cref="T:System.Collections.Generic.IList`1"></see>.
		/// </summary>
		/// <returns>
		/// The index of item if found in the list; otherwise, -1.
		/// </returns>
		/// <param name="item">The object to locate in the <see cref="T:System.Collections.Generic.IList`1"></see>.</param>
		public int IndexOf(T item)
		{
			throw new System.NotImplementedException();
		}

		/// <summary>
		/// Inserts an item to the <see cref="T:System.Collections.Generic.IList`1"></see> at the specified index.
		/// </summary>
		/// <param name="item">The object to insert into the <see cref="T:System.Collections.Generic.IList`1"></see>.</param>
		/// <param name="index">The zero-based index at which item should be inserted.</param>
		/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.IList`1"></see> is read-only.</exception>
		/// <exception cref="T:System.ArgumentOutOfRangeException">index is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"></see>.</exception>
		public void Insert(int index, T item)
		{
			throw new System.NotImplementedException();
		}

		/// <summary>
		/// Removes the <see cref="T:System.Collections.Generic.IList`1"></see> item at the specified index.
		/// </summary>
		/// <param name="index">The zero-based index of the item to remove.</param>
		/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.IList`1"></see> is read-only.</exception>
		/// <exception cref="T:System.ArgumentOutOfRangeException">index is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"></see>.</exception>
		public void RemoveAt(int index)
		{
			throw new System.NotImplementedException();
		}

		public T this[int i]
		{
			get
			{
				return itemList[i];
			}
			set
			{
				throw new System.NotSupportedException();
			}
		}
		public T this[string s]
		{
			get
			{
				T res;
				itemById.TryGetValue(s, out res);
				return res;
			}
		}


		/// <summary>
		/// Returns an enumerator that iterates through the collection.
		/// </summary>
		/// <returns>
		/// A <see cref="T:System.Collections.Generic.IEnumerator`1"></see> that can be used to iterate through the collection.
		/// </returns>
		/// <filterpriority>1</filterpriority>
		public IEnumerator<T> GetEnumerator()
		{
			return itemList.GetEnumerator();
		}

		/// <summary>
		/// Returns an enumerator that iterates through a collection.
		/// </summary>
		/// <returns>
		/// An <see cref="T:System.Collections.IEnumerator"></see> object that can be used to iterate through the collection.
		/// </returns>
		/// <filterpriority>2</filterpriority>
		IEnumerator IEnumerable.GetEnumerator()
		{
			return GetEnumerator();
		}

		/// <summary>
		/// Adds an item to the <see cref="T:System.Collections.Generic.ICollection`1"></see>.
		/// </summary>
		/// <param name="item">The object to add to the <see cref="T:System.Collections.Generic.ICollection`1"></see>.</param>
		/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"></see> is read-only.</exception>
		public virtual void Add(T item)
		{
			var id = GetIdOf(item);
			if (id != null)
				itemById[id] = item;
			itemList.Add(item);
		}

		/// <summary>
		/// Removes all items from the <see cref="T:System.Collections.Generic.ICollection`1"></see>.
		/// </summary>
		/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"></see> is read-only. </exception>
		public void Clear()
		{
			itemList.Clear();
			itemById.Clear();
		}

		/// <summary>
		/// Determines whether the <see cref="T:System.Collections.Generic.ICollection`1"></see> contains a specific value.
		/// </summary>
		/// <returns>
		/// true if item is found in the <see cref="T:System.Collections.Generic.ICollection`1"></see>; otherwise, false.
		/// </returns>
		/// <param name="item">The object to locate in the <see cref="T:System.Collections.Generic.ICollection`1"></see>.</param>
		public bool Contains(T item)
		{
			return itemList.Contains(item);
		}

		/// <summary>
		/// Copies the elements of the <see cref="T:System.Collections.Generic.ICollection`1"></see> to an <see cref="T:System.Array"></see>, starting at a particular <see cref="T:System.Array"></see> index.
		/// </summary>
		/// <param name="array">The one-dimensional <see cref="T:System.Array"></see> that is the destination of the elements copied from <see cref="T:System.Collections.Generic.ICollection`1"></see>. The <see cref="T:System.Array"></see> must have zero-based indexing.</param>
		/// <param name="arrayIndex">The zero-based index in array at which copying begins.</param>
		/// <exception cref="T:System.ArgumentOutOfRangeException">arrayIndex is less than 0.</exception>
		/// <exception cref="T:System.ArgumentNullException">array is null.</exception>
		/// <exception cref="T:System.ArgumentException">array is multidimensional.-or-arrayIndex is equal to or greater than the length of array.-or-The number of elements in the source <see cref="T:System.Collections.Generic.ICollection`1"></see> is greater than the available space from arrayIndex to the end of the destination array.-or-Type T cannot be cast automatically to the type of the destination array.</exception>
		public void CopyTo(T[] array, int arrayIndex)
		{
			itemList.CopyTo(array,arrayIndex);
		}

		/// <summary>
		/// Removes the first occurrence of a specific object from the <see cref="T:System.Collections.Generic.ICollection`1"></see>.
		/// </summary>
		/// <returns>
		/// true if item was successfully removed from the <see cref="T:System.Collections.Generic.ICollection`1"></see>; otherwise, false. This method also returns false if item is not found in the original <see cref="T:System.Collections.Generic.ICollection`1"></see>.
		/// </returns>
		/// <param name="item">The object to remove from the <see cref="T:System.Collections.Generic.ICollection`1"></see>.</param>
		/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"></see> is read-only.</exception>
		public virtual bool Remove(T item)
		{
			itemById.Remove(GetIdOf(item));
			return itemList.Remove(item);
		}

		protected abstract string GetIdOf(T item);


		/// <summary>
		/// Gets the number of elements contained in the <see cref="T:System.Collections.Generic.ICollection`1"></see>.
		/// </summary>
		/// <returns>
		/// The number of elements contained in the <see cref="T:System.Collections.Generic.ICollection`1"></see>.
		/// </returns>
		public int Count
		{
			get
			{
				return itemList.Count;
			}
		}

		/// <summary>
		/// Gets a value indicating whether the <see cref="T:System.Collections.Generic.ICollection`1"></see> is read-only.
		/// </summary>
		/// <returns>
		/// true if the <see cref="T:System.Collections.Generic.ICollection`1"></see> is read-only; otherwise, false.
		/// </returns>
		public bool IsReadOnly
		{
			get
			{
				return false;
			}
		}
	}
}